Oil filter



J. H. LONG Aug. 6, 1940.v

OIL FILTER Filed July 20. 19:58

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0000 an u @ooe 9000.0

h3 m j nnfntot.' James Ji. Long,

Patented Aug. 6, '1940,I

UNITED STATES PATENT OFFICE y on. FmrEa l James Il. Long, Clay Center, Kans. Application July 20, 1938, `Serial No. 220,252

' 1 claim. (ci. 21o-i311 My invention relates in general to oil-treating devices and more particularly to oil lilters for iiitering Vthe oil of internal combustion engines equipped with `means for circulating the oil '5. -through the associated filters.

The primary object oi the invention is-the provision of a simple and inexpensive device of this character which.can be readily assembled, or`I taken apart to the end vi:hatthe inexpensive iillII tering medium employed can be replaced when desired at a small expenditure of time and labor and without the necessity of discarding any part of the device. v

A further object is to arrange the parts in such l manner; 'that the `oi1 will not'have a long or tortuous path to travel in reaching and passing through thefltering medium, to the end that the oil may. passv more frequently through the device andjthus be maintained in a cleaner con?- '20 dition.

Another object is to arrange the parts in such .manner as to seal off the flltering material from the illtered oil so that there will be no danger of particles of the nltering'material getting into g5 and clogging the oil passages.

Other objects will hereinafter appear, andin orderthat the invention may be fully understood, reference will now be had to the accompanying drawing which shows a vertical sec#- 30 tional View of a lter constructed in accordance 1 with my invention. e

Referring in detail to the different parts, 2 designates a. casing comprising an outer imperforate cylinderr3 and a base 4 which latter has a large depression in its upper portion into which the heavier impurities in the oil may settle. The cylinder 3 has-y a closed top 5 and an open bottom, which latter rests in an annular groove 6 in the base '4. The groove. Ii iS pro- 40 vided with a gasket III to form an oil tight joint between the lower end of the cylinder 3 and the base 4, which latter has anfinlet I2 and an,out let I4 into which the ends of pipes I6 and I8, respectively, are'threaded. The oil is, circulated engine, not shown, and my filtering device through the pipes IB and I3 in the-usual manner. The inlet I2 communicates with `a"bypass `2li which leads '-'to the outlet I4 and is con-A trolled by a normally closed check-valve 22.

Arranged axially L and removably within the back and forth betw en the internal combustion.

casing 2 is a foraminous lter container 24 which occupies the m'ajor portion of the internal space of casing 2 and in which the fiiltering element .prmaterlal is placed. The `container :s is

rial.

ltight joint at that point( A coil spring 48, held preferably of cylindrical form, closed at its lower end with a fixed'bttom 26 and provided at its upper open end with a removable lid 284 so that the ltering material-A may be readily placed within o`r removed from the container 24, which 5 may consist of sheet material perforated uniformly from top to bottom, 'or wire cloth of suitable mesh. 'I'he flltering material A may consist of cotton-waste, felt, Wool,'or othersuitable matelo Arranged concentrically and removably within the container 24 is a foraminous tube 32 into which the ltered oil enters from the container 24. The tube 32 may. be made of the saine material as the -container- 24 and is preferably the same length but oi less diameter than the interior of .the latter. In order to prevent any part of the ltering material A from being forced into the tube 32 with the filtered oil I provide said tube with small perforations throughA which the nlteringfmaterial cannot pass and seal the upper lower ends of the tube against the entranceof any ofthe material, .with a iixed closure 34 and a sleeve 36, respectively. A

The sleeve 36 is xed to the container bottom 26 and telescopes into the-open lower, end of the tube 32. The sleeve y 36 supports the filter container 24 above Ithe base 4 to provide a chamber in which the heavy impurities in the oil may accumulate. The lower'part of the sleeve ,extends downward and communicates with the outlet I4. A peripheral shoulder 3l onthe lower portion .ofjthe sleeve 36 rests upon the 'base 4 and limits the entrance of the sleeve into the outlet I4.

The cylinder 2 and the base ,4 are held in as.- sembly with an axially disposed tie-rod 33 provided at its upper enlarged end with a head 4II andl threaded at its lower end in a fittin 42 which extends downward and is threaded inthe base 4. `A copper or other suitable gasket 44 is interposed between the top of *the cylinder 2 and the head 4|! of 'the tie-rod 38 to provide an oilin place by the tierbd 33, isli'nterposed between the casing top Pand lid 28. The spring 4l presses the lid 28 down against the' top 34 of the tube .32, the lower-.end oi which/bears upon,A thecontainer bottom 28. The pressure oi the /spring' 48 holds the shcyilder 3l of the sleeve 38 rmly againstthe top o! base 4.

In` practice oil`- is' forced into the casing 2 through the 1111er 1 2 and after mung the casing, enters-the container 24 through i the vperiorations thereof and. throughIk theD illtering` ma- 65 term A which removes ,the impurities. The r11-- tered oil then enters tube 32 and escapes through sleeve 36 and outlet Il.

The old iiltering material can bereadily re.-

placed at small expense by fresh material after removal of the tie-rod 38 to permit access to the container 24 `and tube '32, the former ofwhich is removable from thel casing.2, while the tube 32 is removable from saidy container, so that all pensive than the sealed illter cartridges used in f of the periorations mayjbe cleansed preparatory to again assembling the-several parts.

-From the foregoing description taken in connection with the drawing it is apparent that I have provided an emcient oil filter in which the filtering medium, after becoming permeated with impurities, canbev easily and quickly replaced with new filtering' material which is. less exsome types of oil lters and which must be discarded when no longer -flt ior/ It isjalso apparent that my device may be manufactured and maintained at low cost and that the altering medium is sealed otr from the :filtered oil, thereby eliminating all possibility of the oil passages becoming clogged with particles of the filtering material.`

While I have shown one form of myvdevice it. is to be understood that I reserve allvrights tol such otheroiorms and modifications falling with-v in the spirit .and scope o! the invention as clalmedg.

claim and desire'to secure by'Letters Patent, is.:

t 'Y said tting. Having thus described my invention, what I i An oil lter for internal ,combustion engines comprising a base having a depression in its upper portion and provided with an inlet and an outlet, a valvej controlled-bypass leading trom the inlet to` the outlet, an 'outer imperforate cylinder closed at its top and having an open lbottom seated in the upper portion of said be,

, same Ilength as `the filter container in which it is' concentrically held by the upper portion of said sleeve over which it is .removably fitted,.a removable lid for' the lter container bearing against the upper end] of the foraminous tube,

a coiled spring interposed between the top-of,`V

the outer? casing and said lid and pressing the' latter against the upper end of the Ioraminous tube and the sleeve against the base, a fitting threaded lcentrally in the upper portion ofthe base, and a tie-rod extending axially through the outert casing and threaded .at its lower-end into 

